how to open an input file in c++
#include <fstream>
ifstream file_variable; //ifstream is for input from plain text files
file_variable.open("input.txt"); //open input.txt
file_variable.close(); //close the file stream
/*
Manually closing a stream is only necessary
if you want to re-use the same stream variable for a different
file, or want to switch from input to output on the same file.
*/
_____________________________________________________
//You can also use cin if you have tables like so:
while (cin >> name >> value)// you can also use the file stream instead of this
{
cout << name << value << endl;
}
_____________________________________________________
//ifstream file_variable; //ifstream is for input from plain text files
ofstream out_file;
out_file.open("output.txt");
out_file << "Write this scentence in the file" << endl;
Are there any code examples left?
New code examples in category C++
-
C++ 2023-04-28 17:44:25
-
C++ 2022-03-27 19:20:39 lists occurrences of characters in the string c++
-
C++ 2022-03-27 18:00:14 variabili in c++
-
C++ 2022-03-27 17:10:08 repeat character n times c++
-
C++ 2022-03-27 15:50:07 delete an array c++
-
C++ 2022-03-27 15:40:12 C++ pointer to base class
-
C++ 2022-03-27 12:15:21 find the graph is minimal spanig tree or not
-
C++ 2022-03-27 11:30:15 multi variable assignment cpp
-
C++ 2022-03-27 11:05:17 c++ pi float
-
C++ 2022-03-27 10:20:12 why exceptions can lead to memory leaks